Configured-logger-file-set-append-mode

Update the append-mode policy used by a ConfiguredLogger file sink. This helper changes future reopen behavior without forcing an immediate reopen.

Interface

pub fn ConfiguredLogger::file_set_append_mode(self : ConfiguredLogger, append : Bool) -> Bool {}

input

• self : ConfiguredLogger - Config-driven runtime logger whose append-mode policy should change.
• append : Bool - New append-mode policy.

output

• Bool - Whether the policy update was applied.

Explanation

Detailed rules explaining key parameters and behaviors

• File-backed sinks update their stored append policy through the wrapped RuntimeSink.
• Queued file sinks forward the policy update to the wrapped inner file sink.
• This helper updates policy only; it does not force immediate reopen.
• Non-file sinks return false.

How to Use

Here are some specific examples provided.

When Need To Change Future Reopen Behavior

When runtime recovery should later prefer append mode explicitly:

ignore(logger.file_set_append_mode(true))

In this example, later reopen operations will use the updated append policy.

When Want To Separate Policy Mutation From Reopen Timing

When code should update policy now and reopen later:

ignore(logger.file_set_append_mode(false))
ignore(logger.file_reopen_with_current_policy())

In this example, policy mutation and reopen timing remain separate decisions.

Error Case

e.g.:

• If the configured sink is not file-backed, the method returns false.

• If callers need an immediate reopen as part of the same operation, one of the reopen helpers should be used afterward.

Notes

1. This helper changes stored policy, not live file-handle state by itself.

2. It is useful when recovery logic wants to stage reopen behavior in advance.